JPH03246507A - Heat resistant plastic optical fiber - Google Patents
Heat resistant plastic optical fiberInfo
- Publication number
- JPH03246507A JPH03246507A JP2043730A JP4373090A JPH03246507A JP H03246507 A JPH03246507 A JP H03246507A JP 2043730 A JP2043730 A JP 2043730A JP 4373090 A JP4373090 A JP 4373090A JP H03246507 A JPH03246507 A JP H03246507A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- plastic optical
- polycarbonate
- arom
- copolymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013308 plastic optical fiber Substances 0.000 title claims abstract description 24
- 229920001577 copolymer Polymers 0.000 claims abstract description 9
- 239000011162 core material Substances 0.000 claims description 11
- 125000003118 aryl group Chemical group 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims 2
- 239000004417 polycarbonate Substances 0.000 abstract description 17
- 229920000515 polycarbonate Polymers 0.000 abstract description 17
- 125000004185 ester group Chemical group 0.000 abstract description 9
- 229920000728 polyester Polymers 0.000 abstract description 3
- 239000013307 optical fiber Substances 0.000 abstract description 2
- 239000002657 fibrous material Substances 0.000 abstract 3
- -1 poly(methyl methacrylate) Polymers 0.000 description 13
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 239000004926 polymethyl methacrylate Substances 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- 125000005587 carbonate group Chemical group 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920001230 polyarylate Polymers 0.000 description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 1
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical class C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical class CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 239000004419 Panlite Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical group CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical compound FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は高い耐熱性を有するプラスチック光ファイバに
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a plastic optical fiber having high heat resistance.
（従来の技術）
従来、光を伝送するファイバは、石英ガラスやプラスチ
ックより作られている。石英ガラス系光ファイバは低損
失であるため、長距離伝送用として現在広く使われてい
る。プラスチック光ファイバは石英ファイバの物に比べ
ると大きいものの、可どう性がよく、軽量でしかも加工
しやすいため、短距離伝送用として電子機器等に使用さ
れている。(Prior Art) Conventionally, fibers for transmitting light have been made of quartz glass or plastic. Silica glass optical fibers have low loss and are currently widely used for long-distance transmission. Although plastic optical fibers are larger than quartz fibers, they are flexible, lightweight, and easy to process, so they are used in electronic devices and the like for short-distance transmission.
現在実用化されているプラスチック光ファイバの多くは
芯材（コア材）が透明性のよいポリ（メタクリル酸メチ
ル）で構成されているが、ポリ（メタクリル酸メチル）
の耐熱性は１００℃程度であるため、これらのプラスチ
ック光ファイバは高温となる（例えば１５０℃以上）自
動車のエンジンルーム内で自動車の制御信号伝送用とし
て使用することができない。そこでプラスチック光ファ
イバの耐熱温度を向上させるために種々の試みがされて
いる。例えばポリ（メタクリル酸メチル）の耐熱性を向
上させるため、メタクリル酸メチルとＮ−アリールマレ
イミドを共重合させる方法（特公昭４３−９７５３号）
、ポリ（メタクリル酸メチル）の一部をイミド化する方
法（特開昭６０−１８４２１２号、特開昭６０−１８５
９０５号）、メタクリル酸メチルとα−メチルスチレン
を共重合させる方法等の試みがされている。また近年ポ
リ（メタクリル酸メチル）以外の芯材としてポリカーボ
ネートが用いられるようになってきた（特開昭６１−６
６０４号、特開昭６１−６６０４号）。Most of the plastic optical fibers currently in practical use have a core material made of highly transparent poly(methyl methacrylate), but poly(methyl methacrylate)
Since the heat resistance of plastic optical fibers is about 100° C., these plastic optical fibers cannot be used for transmitting control signals of automobiles in the engine room of automobiles where the temperature is high (for example, 150° C. or higher). Therefore, various attempts have been made to improve the heat resistance of plastic optical fibers. For example, in order to improve the heat resistance of poly(methyl methacrylate), a method of copolymerizing methyl methacrylate and N-arylmaleimide (Japanese Patent Publication No. 43-9753)
, Method of imidizing a part of poly(methyl methacrylate) (JP-A-60-184212, JP-A-60-185)
No. 905), and methods of copolymerizing methyl methacrylate and α-methylstyrene have been attempted. In addition, in recent years, polycarbonate has come to be used as a core material other than poly(methyl methacrylate) (Japanese Patent Laid-Open No. 61-6
No. 604, Japanese Unexamined Patent Publication No. 61-6604).
（発明が解決しようとする課題）
しかしながら従来用いられてきたポリカーボネートで作
られたプラスチック光ファイバでも耐熱温度が１２５℃
程度であり、自動車のエンジンルーム内のような高温に
耐え得るものではなかった。(Problem to be solved by the invention) However, even the conventionally used plastic optical fiber made of polycarbonate has a heat resistance temperature of 125°C.
It was not able to withstand the high temperatures found in the engine room of a car.
本発明の目的は耐熱性に優れたプラスチック光ファイバ
を提供することにある。An object of the present invention is to provide a plastic optical fiber with excellent heat resistance.
（課題を解決するための手段）
本発明の目的は芯材が下記式［Ｉ］のＡ部とＢ部を必須
成分とすると共重合体から成るプラスチック光ファイバ
とすることにより達成された。(Means for Solving the Problems) The object of the present invention has been achieved by providing a plastic optical fiber whose core material is a copolymer in which parts A and B of the following formula [I] are essential components.
Ａ部 Ｂ部
（式中Ｘ ＋ 、 Ｘ ｚ及びＹｌは芳香族残基を示す
。）好ましくは、Ａ部のモル比は８０〜２０％、Ｂ部の
モル比は２０〜８０％である。Part A Part B (in the formula, X + , X z and Yl represent aromatic residues) Preferably, the molar ratio of Part A is 80 to 20%, and the molar ratio of Part B is 20 to 80%.
本発明において一般式［Ｉ］のＸ、、Ｘ、としては下記
のようなものが挙げられ、Ｘ、とＸ２は互いに同じでも
異なってもよい。In the present invention, examples of X and X in general formula [I] include the following, and X and X2 may be the same or different.
下記式中Ａ１〜Ａ４は水素原子、ハロゲン原子（例えば
（Ｃｊ２．Ｂｒ、Ｆ）又はアルキル基（例えば（ＣＨ，
、Ｃ，Ｈ，））を示し、ｋは１〜１０の数を示す。In the following formulas, A1 to A4 are hydrogen atoms, halogen atoms (e.g. (Cj2.Br, F), or alkyl groups (e.g. (CH,
, C, H, )), and k represents a number from 1 to 10.
ＣＨ。CH.
また一般式［Ｉ］ におけるＹｌ としては下記の ものがあげられる。Also, general formula [I] Yl at As below Things can be given.
なお式中には１〜５の数を表 わす。Please note that the numbers 1 to 5 are shown in the ceremony. Was.
（■
（軒Ｏ÷
一＠）−ＡＣＨ・愉（ト
ベ◇−５（Ｑト
また、本発明において一般式［Ｉ］で表わされる共重合
体＃ｉＢ部におけるＹｌの一部を脂肪族から成る下記Ｙ
２で置き換えても良い。(■ (Eave O ÷ 1 @) - ACH · Yu (Tobe ◇ - 5 (Q To) Also, in the present invention, a part of Yl in the copolymer #iB part represented by the general formula [I] is composed of an aliphatic Y below
It may be replaced with 2.
Ｙ２の量は共重合体の所望の耐熱性を損なわない範囲で
適宜に定められるが、通常Ｙ１と置き換えるＹ２の量は
ＹｌとＹ２の合計量の２０モル％以下の範囲である。The amount of Y2 is appropriately determined within a range that does not impair the desired heat resistance of the copolymer, but the amount of Y2 that replaces Y1 is usually in the range of 20 mol% or less of the total amount of Yl and Y2.
下記式中−ＣｍＨｎ−はＣ３〜Ｃ１゜の飽和炭化水素基
を示す。In the following formula, -CmHn- represents a C3 to C1° saturated hydrocarbon group.
−Ｈ，Ｃ−３−ＣＨ２−
ＣｍＨｎ−
本発明に用いられる芳香族ポリカーボネート共重合体に
おいて当該共重合体のカーボネート基とエステル基の比
率は特に制限はないがエステル基の両末端が芳香族であ
る場合、カーボネート基とエステル基の比率はカーボネ
ート基／エステル基のモル比が９０／１０〜ｌ Ｏ／９
０の範囲が好ましく、８０／２０〜２０／８０の範囲が
より好ましい。エステル基が１０％より小さくなると従
来のものに比べ耐熱性が向上せず、また９０％より大き
くなると加工性が著しく低下し、樹脂の着色、伝送損失
の低下を生じることがある。-H,C-3-CH2- CmHn- In the aromatic polycarbonate copolymer used in the present invention, there is no particular restriction on the ratio of the carbonate group to the ester group in the copolymer, but it is preferable that both ends of the ester group are aromatic. In some cases, the ratio of carbonate groups to ester groups is such that the molar ratio of carbonate groups/ester groups is between 90/10 and 1 O/9.
The range of 0 is preferable, and the range of 80/20 to 20/80 is more preferable. If the ester group content is less than 10%, the heat resistance will not be improved compared to conventional products, and if it is more than 90%, the processability will be significantly reduced, and the resin may be colored and transmission loss may be reduced.
本発明のプラスチック光ファイバに用いられる鞘材とし
てはフッ素系樹脂（例えばテトラフルオロエチレン、フ
ッ化ビニリデン、６フツ化プロピレン等の単独重合体又
は共重合体など）、ポリメチルペンテン系ポリマー、イ
ミド化あるいは脱水メタクリル酸系ポリマー、長鎖アル
キル鎖を有するアクリル系化合物、あるい繰り返し単位
を有するものなど屈折率の比較的小さいポリカーボネー
トなど１５０℃以上の耐熱性を有するものであれば特に
限定しないが、耐熱性を考慮すると、非品性パーフルオ
ロフッ素樹脂、例えば
−ｃＦｓ
がよい。Examples of sheath materials used in the plastic optical fiber of the present invention include fluororesins (for example, homopolymers or copolymers of tetrafluoroethylene, vinylidene fluoride, propylene hexafluoride, etc.), polymethylpentene polymers, imidized polymers, etc. Alternatively, it is not particularly limited as long as it has heat resistance of 150 ° C. or higher, such as dehydrated methacrylic acid polymer, acrylic compound having a long alkyl chain, or polycarbonate with a relatively low refractive index such as those having repeating units. In consideration of heat resistance, a non-grade perfluorofluororesin, such as -cFs, is preferable.
また芯材−鞘材間の密着性を考慮すると式（式中、Ａ、
〜Ａ４は水素原子、ハロゲン原子（例えばＣρ、Ｂｒ、
Ｆ）、アルキル基（例えばＣＨ−、Ｃ２Ｈｇ ）を示す
。）で表わされるポリカーボネート系の樹脂がよい。In addition, considering the adhesion between the core material and the sheath material, the formula (where A,
~A4 is a hydrogen atom, a halogen atom (e.g. Cρ, Br,
F) represents an alkyl group (e.g. CH-, C2Hg). ) is preferably a polycarbonate resin.
本発明のプラスチック光ファイバを紡糸する際、樹脂の
ガラス転位点が高いため従来より高温を必要とする。す
なわちポリ（メタクリル酸メチル）樹脂の場合は２４０
℃程度であったが、３００℃以上程度まで温度を上げる
必要がある。When spinning the plastic optical fiber of the present invention, a higher temperature than before is required because the glass transition point of the resin is high. In other words, in the case of poly(methyl methacrylate) resin, it is 240
The temperature was about 300°C, but it is necessary to raise the temperature to about 300°C or higher.
その他の点は常法に従って紡糸ができる。Other points can be spun according to conventional methods.
（実施例） 次に本発明を実施例に基づきさらに詳細に説明する。(Example) Next, the present invention will be explained in more detail based on examples.
実施例１
撹はん機、温度計及びガス導入口を備えた容器中に２モ
ルのビスフェノールＡと０．５モルのテレフタル酸３５
００Ｔｆｊのピリジンを加えた。これを２５〜３５℃に
保ちつつ撹はんしホスゲンを導入した。Example 1 2 mol of bisphenol A and 0.5 mol of terephthalic acid 35 in a container equipped with a stirrer, thermometer and gas inlet
00Tfj of pyridine was added. While maintaining the temperature at 25 to 35°C, phosgene was introduced while stirring.
得られた重合体を沈殿させ、インプロパツールで洗浄し
乾燥させた後、塩化メチレンに溶解させ、再沈、インプ
ロパツールで洗浄し乾燥した。The obtained polymer was precipitated, washed with impropatool and dried, then dissolved in methylene chloride, reprecipitated, washed with impropatool and dried.
さらにこれを塩化メチレンに溶かし、０．２μｍのフィ
ルターを通して精製した。得られたポリカーボネートの
軟化温度は１９５℃であり屈折率は１，６０であった。Furthermore, this was dissolved in methylene chloride and purified through a 0.2 μm filter. The resulting polycarbonate had a softening temperature of 195° C. and a refractive index of 1.60.
また分子量は２８０００であった。Moreover, the molecular weight was 28,000.
このポリカーボネートは無酸素下で溶融部分の温度が３
００℃以上に設定された二重押出し装置に供給された。This polycarbonate has a melting point temperature of 3 in the absence of oxygen.
The sample was fed into a double extruder set at 00°C or higher.
また鞘材となるＦＥＰ（テトラフルオロエチレン−６フ
ツ化プロピレン共重合体）も二重押出し機に供給された
。Further, FEP (tetrafluoroethylene-hexafluorinated propylene copolymer), which is a sheath material, was also supplied to the double extruder.
こうして得られたプラスチック光ファイバをカットバッ
ク法（１１ｍ−１ｍ）（７７０ｎｍ）で測定したところ
１１００ ｄＢ／ｋｍであった。またこのファイバを１
４０℃で１週間の熱処理を加えても損失層はほとんど歓
測されなかった。この結果を第１表に示した。When the thus obtained plastic optical fiber was measured by the cutback method (11 m-1 m) (770 nm), it was found to be 1100 dB/km. Also, connect this fiber to 1
Even after heat treatment at 40° C. for one week, almost no loss layer was observed. The results are shown in Table 1.
実施例２〜１３
ビスフェノールとジカルボン酸を第１表に示すように用
いて実施例１と同様な方法でポリカーボネート共重合体
を得た。Examples 2 to 13 Polycarbonate copolymers were obtained in the same manner as in Example 1 using bisphenols and dicarboxylic acids as shown in Table 1.
こうして得られたポリカーボネート共重合体の軟化温度
、及び屈折率を第１表に示した。Table 1 shows the softening temperature and refractive index of the polycarbonate copolymer thus obtained.
実施例１と同様にして得られたプラスチック光ファイバ
の７７０止での伝送損失（ｌ１ｍ−１ｍカットバック法
）と１４０℃１週間熱処理後の伝送損失の変化も第１表
に示した。Table 1 also shows the transmission loss at 770 mm (l1m-1m cutback method) of the plastic optical fiber obtained in the same manner as in Example 1, and the change in transmission loss after heat treatment at 140° C. for one week.
比較例１
ビスフェノールＡからつ（られたポリカーボネート、パ
ンライトＬ−１２５０（商品名、音大化成社製）を芯材
として使用した。その屈折率は１．５９程度であった。Comparative Example 1 Panlite L-1250 (trade name, manufactured by Ondai Kasei Co., Ltd.), a polycarbonate containing bisphenol A, was used as a core material. Its refractive index was about 1.59.
このポリカーボネートを無酸素状態で、溶融部分の温度
が２８０℃以上の一重押出し機に供給した。一方鞘材と
してＦＥＰを用い二重押出し機に供給した。それ以外は
実施例１と同様な処理を行なってプラスチック光ファイ
バを製造した。７７０ｎ＋ｎにおけるファイバの損失値
は１２００ ｄＢ／ｋｍであり、１４０℃１日間の熱処
理後は測定が不可能であった。This polycarbonate was fed under oxygen-free conditions to a single extruder with a temperature of 280° C. or higher in the melting section. On the other hand, FEP was used as a sheath material and fed to a double extruder. Other than that, a plastic optical fiber was manufactured by performing the same treatment as in Example 1. The loss value of the fiber at 770n+n was 1200 dB/km, which could not be measured after heat treatment at 140° C. for one day.
比較例２
ボリアリレート（芳香族ポリエステルＵ−１００：商品
名 ユニチカ社製）を芯材として使用した。Comparative Example 2 Polyarylate (aromatic polyester U-100: trade name, manufactured by Unitika) was used as a core material.
屈折率は１．６０程度であった。The refractive index was about 1.60.
これを無酸素状態で、溶融部分の温度が３００℃以上の
二重押出し機に供給した。一方鞘材としてＦＥＰを用い
二重押出し機に供給した。後は実施例１と同様な処理を
行ってプラスチック光ファイバを製造した。７７０ｎｍ
におけるファイバの損失値は５０００ ｄＢ／ｋｍ以上
であった。This was fed under oxygen-free conditions to a double extruder where the temperature of the melting part was 300°C or higher. On the other hand, FEP was used as a sheath material and fed to a double extruder. After that, the same treatment as in Example 1 was performed to produce a plastic optical fiber. 770nm
The loss value of the fiber was more than 5000 dB/km.
比較例３
撹はん機、温度計及びガス導入口を備えた容器中に２モ
ルのビスフェノールＡと２モルのテレフタル酸と３９０
０ｍ！のピリジンを加えた。これを２５〜３５℃に保ち
つつ撹はんしホスゲンを導入した。Comparative Example 3 2 moles of bisphenol A, 2 moles of terephthalic acid and 390
0m! of pyridine was added. While maintaining the temperature at 25 to 35°C, phosgene was introduced while stirring.
得られた重合体を沈殿させ、イソプロパツールで洗浄し
乾燥させた後、塩化メチレンに溶解させ、再沈、イソプ
ロパツールで洗浄し乾燥した。The obtained polymer was precipitated, washed with isopropanol and dried, then dissolved in methylene chloride, reprecipitated, washed with isopropanol and dried.
さらにこれを塩化メチレンに溶かし、０．２μｍのフィ
ルターを通して精製した。Furthermore, this was dissolved in methylene chloride and purified through a 0.2 μm filter.
このポリマーは無酸素下で溶融部分の温度が３００℃以
上に設定された二重押出し装置に供給された。また鞘材
となるＦＥＰ（テトラオロエチレン−６フツ化プロピレ
ン共重合体）も二重押出し機に供給された。This polymer was fed to a double extrusion device in the absence of oxygen, with the temperature of the melt section set at above 300°C. Further, FEP (tetraoroethylene-hexafluorinated propylene copolymer), which serves as a sheath material, was also supplied to the double extruder.
こうして得られたプラスチック光ファイバをカットバッ
ク法（１１ｍ−１ｍ）（７７０ｎｍ）で測定したところ
５０００ ｄＢ／ｋｍ以上であった。When the thus obtained plastic optical fiber was measured by the cutback method (11 m - 1 m) (770 nm), it was found to be 5000 dB/km or more.
（作用）
本発明のプラスチック光ファイバの芯材として用いられ
ているエステル基を導入した芳香族ポリカーボネート共
重合体には［Ｉ］式の如く芳香族ポリエステルを有して
いるため、屈折率が従来のエステル結合を有さない芳香
族ポリカーボネートに比べ大きくなり、開口係数の向上
をもたらし、また鞘材の選択の幅が大きくなる。(Function) Since the aromatic polycarbonate copolymer into which ester groups are introduced, which is used as the core material of the plastic optical fiber of the present invention, has an aromatic polyester as shown in formula [I], the refractive index is lower than that of the conventional one. compared to aromatic polycarbonate that does not have ester bonds, resulting in an improved aperture coefficient and a wider range of choices for sheath materials.
また当該エステル結合を有する芳香族ポリカーボネート
を芯材として用いたプラスチック光ファイバはカーボネ
ート基及びエステル基がランダムに分布する傾向にあり
、その場合に非晶質性が著しく向上するため、芯材とし
てボリアレートを用いた場合に比べ、著しく透明性が改
善されており、伝送損失が向上している。In addition, plastic optical fibers using aromatic polycarbonate having ester bonds as a core material tend to have carbonate groups and ester groups randomly distributed, and in this case, the amorphous property is significantly improved. Transparency is significantly improved and transmission loss is improved compared to when using .
（発明の効果）
本発明は芳香族エステル基を有するポリカーボネート共
重合体を芯材として用いることにより、高い開口数を有
し、しかも高温に耐え得るプラスチック光フアイバを得
ることができる。(Effects of the Invention) By using a polycarbonate copolymer having an aromatic ester group as a core material, the present invention can provide a plastic optical fiber that has a high numerical aperture and can withstand high temperatures.
また、当該プラスチック光ファイバは芯材としてボリア
リレートを用いたプラスチック光ファイバよりも低い温
度で加工が可能であり、加工性に優れ、また伝送損失も
優れている。Further, the plastic optical fiber can be processed at a lower temperature than a plastic optical fiber using a polyarylate as a core material, has excellent processability, and has excellent transmission loss.
Claims (1)
ら成るプラスチック光ファイバ。 ▲数式、化学式、表等があります▼▲数式、化学式、表
等があります▼・・・〔 I 〕 Ａ部Ｂ部 （式中Ｘ＿１、Ｘ＿２及びＹ＿１は芳香族残基を示す。 ）[Scope of Claims] A plastic optical fiber whose core material is made of a copolymer having the following formula A part and B part as essential components. ▲There are mathematical formulas, chemical formulas, tables, etc.▼▲There are mathematical formulas, chemical formulas, tables, etc.▼...[I] Part A Part B (In the formula, X_1, X_2 and Y_1 represent aromatic residues.)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2043730A JPH03246507A (en) | 1990-02-23 | 1990-02-23 | Heat resistant plastic optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2043730A JPH03246507A (en) | 1990-02-23 | 1990-02-23 | Heat resistant plastic optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03246507A true JPH03246507A (en) | 1991-11-01 |
Family
ID=12671901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2043730A Pending JPH03246507A (en) | 1990-02-23 | 1990-02-23 | Heat resistant plastic optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03246507A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018509486A (en) * | 2015-09-01 | 2018-04-05 | エルジー・ケム・リミテッド | Copolycarbonate and method for producing the same |
| TWI757624B (en) * | 2018-08-10 | 2022-03-11 | 南韓商Ｌｇ化學股份有限公司 | Polycarbonate and preparation method thereof |
-
1990
- 1990-02-23 JP JP2043730A patent/JPH03246507A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018509486A (en) * | 2015-09-01 | 2018-04-05 | エルジー・ケム・リミテッド | Copolycarbonate and method for producing the same |
| TWI769140B (en) * | 2015-09-01 | 2022-07-01 | 南韓商Ｌｇ化學股份有限公司 | Copolycarbonate and method for preparing the same |
| TWI757624B (en) * | 2018-08-10 | 2022-03-11 | 南韓商Ｌｇ化學股份有限公司 | Polycarbonate and preparation method thereof |
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